Calibration Procedures for I.C.I and Brookfield Cap 2000 Viscometers

Sample 0-10MPOISE I.C.I cone and cover plate viscometer

Lower the cone by means of the lever until it stays in contact with the plate.

Allow at least five minutes warm up time when starting the instrument from cold.

Switch on the motor by means of the press button and if necessary adjust the pointer to read zero by means of the zero adjuster.

Raise the cone from the plate and pour 3 or 4 drops of standard oil 5.0 poise (FM 500) on to the centre of the plate. It is important that sufficient material is used so that the cone is completely surrounded. Insufficient material has a serious effect on the results obtained but excess material has very little effect.

Lower cone and wait 15-30 seconds.

Press the button and read indicated viscosity as soon as the pointer comes to rest.

If the reading for the standard oil is within + or – 2% of full scale reading i.e. 0.1 poise the instrument is ready for use. If the reading can not be obtained recheck and call QC Labs for telephone helpline.

Raise the cone and clean the cone plate with paper tissues and suitable solvents.

Apply 3 or 4 drops of test sample on to the centre of the plate.

Lower cone and wait 15-30 seconds.

Press the button and read indicated viscosity as soon as the pointer comes to rest. If the button is pressed for a prolonged period a falling in the indicated viscosity will be noticed. This is due to work heating the sample and this effect is more marked at the high velocity end of the scale.

Raise the cone and clean the cone and plate with paper tissues and a suitable solvent.

Leave the cone in contact with the plate when the instrument is not in use so that the cone and plate remain at the same temperature.

Calibration Oils supplied by the Quality Control Lab are traceable to the National Bureau of Standards.